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thresher shark

(Encyclopedia)thresher shark, long-tailed, warm-water shark, genus Alopias. The upper fork of its tail is slender and sickle-shaped and is about equal in length to the rest of the body. This shark uses its tail str...

Sacramento, river, United States

(Encyclopedia)Sacramento, longest river of Calif., c.380 mi (610 km) long, rising near Mt. Shasta, N Calif., and flowing generally SW to Suisun Bay, an arm of San Francisco Bay, where it forms a large delta with th...

San Andreas fault

(Encyclopedia)San Andreas fault, great fracture (see fault) of the earth's crust in California. It is the principal fault of an intricate network of faults extending more than 600 mi (965 km) from NW California to ...

electron tube

(Encyclopedia)CE5 Triode electron tube electron tube, device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum tube) or by an ionized gas at l...

Industrial Workers of the World

(Encyclopedia)Industrial Workers of the World (IWW), revolutionary industrial union organized in Chicago in 1905 by delegates from the Western Federation of Mines, which formed the nucleus of the IWW, and 42 other ...

student movements

(Encyclopedia)student movements, designation given to the ideas and activities of student groups involved in social protest. Historically, student movements have been in existence almost as long as universities the...

Foster, William Zebulon

(Encyclopedia)Foster, William Zebulon, 1881–1961, American Communist leader, b. Taunton, Mass. An itinerant worker in many different occupations, he was first affiliated with the Socialist party, next with the In...

Hamill, Pete

(Encyclopedia)Hamill, Pete (Wlliam Peter Hamill Jr.), 1935–2020, American journalist and author, b. Brooklyn, N.Y. He served in the U.S. Navy (1952–56) and worked as a graphic designer (1957–60) before being ...

Goldberg, Arthur

(Encyclopedia)Goldberg, Arthur, 1908–90, American labor lawyer and jurist, associate justice of the U.S. Supreme Court (1962–65), b. Chicago. He received his law degree from Northwestern Univ. in 1929. A corpor...

Genet, Edmond Charles Édouard

(Encyclopedia)Genet, Edmond Charles Édouard ĕdmôNˈ shärl ādwärˈ zhənāˈ [key], 1763–1834, French diplomat, known as Citizen Genet. He had served as a French representative in Berlin, Vienna, and St. Pet...